CN117167561A - Large-caliber spiral welded steel pipe with composite structural wall and manufacturing method thereof - Google Patents
Large-caliber spiral welded steel pipe with composite structural wall and manufacturing method thereof Download PDFInfo
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- CN117167561A CN117167561A CN202310991874.7A CN202310991874A CN117167561A CN 117167561 A CN117167561 A CN 117167561A CN 202310991874 A CN202310991874 A CN 202310991874A CN 117167561 A CN117167561 A CN 117167561A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 363
- 239000010959 steel Substances 0.000 title claims abstract description 363
- 239000002131 composite material Substances 0.000 title claims abstract description 63
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 95
- 238000003466 welding Methods 0.000 claims abstract description 70
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000005096 rolling process Methods 0.000 claims abstract description 15
- 230000035515 penetration Effects 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 108
- 238000003825 pressing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 241000272525 Anas platyrhynchos Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000013601 eggs Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/16—Rigid pipes wound from sheets or strips, with or without reinforcement
- F16L9/165—Rigid pipes wound from sheets or strips, with or without reinforcement of metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
- B23K31/027—Making tubes with soldering or welding
Abstract
The application discloses a large-caliber spiral welded steel pipe with a composite structure wall, which is formed by spirally rolling and welding double-layer composite steel belts; the double-layer composite steel belt comprises a first steel belt layer and a second steel belt layer which are equal in width, parallel and staggered; at least two reinforcing ribs perpendicular to the first steel belt layer and the second steel belt layer are arranged between the first steel belt layer and the second steel belt layer, and are arranged in a coextensive manner with the steel belt layers; reinforcing ribs are respectively arranged at the edges of the first steel belt layer and the second steel belt layer, which are overlapped in the vertical direction, and after spiral rolling, adjacent steel belt layers of the steel pipe are connected through staggered edges; its preparing process is also disclosed. The welding seams of the inner pipe wall and the outer pipe wall of the spiral welded steel pipe are not overlapped, so that stress concentration is avoided, the strength of the steel pipe is increased, materials are saved during manufacturing, and the rolling power requirement is low.
Description
Technical Field
The application relates to the technical field of steel pipe welding, in particular to a large-caliber spiral welded steel pipe with a composite structure wall and a manufacturing method thereof.
Background
The current large-caliber steel pipes are used as water supply pipelines in many cases, and most of the large-caliber steel pipes are buried. So the steel pipe itself satisfies the internal pressure of the medium flowing in the pipe, the pressure of the external load and the deformation of duck eggs caused by the self weight, which requires the thick wall thickness of the steel pipe, and the main purpose of the steel pipe is to convey the fluid, the internal pressure is satisfied, and the wall thickness of the steel pipe is not required to be too thick when the requirement is satisfied, for example: a water supply pipe with a diameter of 3 meters satisfying the internal pressure has a wall thickness=pd/zk (σs) = (0.6 mpa×3000 mm)/(2×0.85×177.5 mpa) =5.96 mm, where P: internal pressure, D: pipe inner diameter, σs: allowable stress, k: weld coefficient (spiral welded pipe), the allowable stress in the above calculation takes 2 times of safety coefficient. As can be seen from the calculation, the wall thickness of the steel pipe is only 5.96mm when the internal pressure of 3000mm diameter is 0.6MPa, but in practical application, in order to prevent the dead weight deformation of the steel pipe and the deformation caused by external pressure during burying, the wall thickness is always increased, in practical engineering, the wall thickness of the 3m diameter water supply pipe is more than 25mm, the material is seriously wasted, the dead weight deformation of the steel pipe and the deformation caused by burying external pressure are actually prevented, the wall thickness is increased by a method for increasing the section moment of inertia of the pipe wall, although the wall thickness is also a method for increasing the section moment of inertia of the pipe wall, the wall thickness is only in a proportional multiple relationship, but not in a geometric multiple relationship, in addition, when the wall thickness of the steel pipe with ultra-large caliber is larger than 25mm, the steel plate material of a steel mill cannot be delivered in a steel coil state, and only the single steel plate state can be delivered, so the processing mode of the steel pipe is that a single steel plate is rolled, a straight joint is welded, the single steel pipe is manufactured, the length of the single steel pipe is generally 3m, then a plurality of single-section butt welds are manufactured, the production efficiency is low, the method is compared with the production efficiency, the ratio of the straight joint weld, the ratio is lower than the required, the thickness of the spiral weld ratio, and the stress coefficient is larger than the required, and the stress coefficient is larger than the steel than the weld.
The inventors have previously applied for a name: a double-wall spiral welded pipe and a manufacturing method thereof are provided, wherein the application number is as follows: 202110902131.9, and the initial trial production of products in the past, found that the welding seams of the inner and outer walls of the steel pipe form a superposition of the welding seams on a straight line in the trial production process, so that stress concentration is easy to form, and in the rolling test process, two vertical reinforcing rings at the spiral welding seams are arranged side by side, so that the strength is too high, difficulty is brought to the rolling processing, and the material cost is increased.
The inventor finds that the double-wall composite structure spiral steel pipe is very large in section moment of inertia of the pipe wall in the process of rolling, the rolling force is required to be large, the rolling force is formed by forward pushing force of the steel belt, the pushing force is formed by pushing the steel belt up and down by driving roll shafts acting on the steel belt up and down, the steel belt is pushed by friction force formed by pushing the steel belt up and down by the roll shafts, when the pushing force is required to be very large, the pressure required by pushing the steel belt by the upper and lower roll shafts is very large, and according to calculation and practical experiments, when the pushing force to the steel belt is very large, the vertical reinforcing ribs in the steel belt can generate instability bending phenomenon, the composite steel belt can be flattened, as shown in fig. 2, when the thickness of the vertical reinforcing ribs is increased to solve the problem, the rolling force can be increased, the pushing force of the steel belt can be increased, the pushing force to the steel belt can be increased, the vertical reinforcing ribs can bear larger pressure, or can be crushed, and the production and processing can not be realized.
Disclosure of Invention
The application aims to: in order to overcome the defects of the background technology, the first aim of the application is to disclose a large-caliber spiral welded steel pipe with a composite structure wall; the second purpose is to disclose a manufacturing method of the large-caliber spiral welded steel pipe with the composite structure wall.
The technical scheme is as follows: the application discloses a large-caliber spiral welded steel pipe with a composite structure wall, which is formed by spirally rolling and welding double-layer composite steel belts; the double-layer composite steel belt comprises a first steel belt layer and a second steel belt layer which are equal in width, parallel and staggered; at least two reinforcing ribs perpendicular to the first steel belt layer and the second steel belt layer are arranged between the first steel belt layer and the second steel belt layer, and are arranged in a coextensive manner with the steel belt layers; reinforcing ribs are respectively arranged at the edges of the first steel belt layer and the second steel belt layer, which are overlapped in the vertical direction, and after spiral rolling, adjacent steel belt layers of the steel pipe are connected through staggered edges.
Further, the outer side edge of the reinforcing rib arranged at the vertical direction superposition edge of the first steel belt layer and the second steel belt layer is convex with the steel belt layer, when the double-layer composite steel belt is welded, the convex part of one side reinforcing rib is overlapped with the staggered edge of the steel belt which reaches the steel belt joint position after being coiled for one circle, and a welding joint is formed with the steel belt layer.
The welding groove can be used for welding the adjacent steel strip layers together with the contacted reinforcing ribs, and the welded pipe wall can be smooth.
Further, a plurality of reinforcing ribs are arranged between the reinforcing ribs on two sides of the steel belt layer at intervals at the same time, the first steel belt layer and the second steel belt layer are supported, and all reinforcements are mutually parallel and are arranged in a co-extending mode.
Furthermore, the reinforcing ribs additionally arranged in the steel belt layer are welded with the steel belt layer into a whole by penetration welding.
Furthermore, under the condition that penetration welding is not adopted, the first steel belt layer is formed by arranging and welding a plurality of split steel belts in parallel, the joints of the adjacent split steel belts correspond to one reinforcing rib, and when the double-layer composite steel belt is in rolling welding, the first steel belt layer is positioned on the outer wall of the pipeline.
When welding the seam of adjacent split steel bands, the welding can be performed with corresponding reinforcing ribs simultaneously, so that the fixing of the three parts is realized, and the structure is firmer.
Meanwhile, because a welding line exists between the split steel belts, a continuous spiral welding line is formed when the split steel belts are coiled and welded into a pipeline, and the spiral welding line is not beneficial to water flow to pass through quickly, when the double-layer composite steel belt is coiled and welded, the first steel belt is positioned on the outer wall of the pipeline, so that the spiral welding line is positioned on the outer wall of the pipeline.
Further, the cavity between the first steel belt layer and the second steel belt layer is filled with concrete.
Further, shear nails are arranged on the inner sides of the first steel belt layer and the second steel belt layer.
Further, steel bars are arranged between the first steel belt layer and the second steel belt layer.
Further, the reinforcing rib is formed steel, for example: h-shaped steel, channel steel, angle steel bar, thin steel pipe, steel bar or wave steel.
The manufacturing method of the large-caliber spiral welded steel pipe with the composite structure wall comprises the following steps:
s1, discharging a second steel belt from a steel coil, and horizontally placing to form a second steel belt layer;
s2, discharging reinforcing ribs from a plurality of vertical steel coils, placing the reinforcing ribs perpendicular to the second steel belt layer, wherein two outermost reinforcing ribs are arranged at the side end part of the second steel belt layer, one reinforcing rib is arranged at a position which is a distance away from the other side end part of the second steel belt layer, and the bottoms of the reinforcing ribs are welded with the second steel belt layer;
s3, releasing a first steel belt with the same width as the second steel belt from the steel coil, horizontally arranging the first steel belt on the reinforcing ribs in a staggered manner corresponding to the second steel belt to form a first steel belt layer, respectively corresponding to a part of a distance from one side end part of the first steel belt layer to the two reinforcing ribs mentioned in S2, and welding and fixing the other side end part of the first steel belt layer to form a double-layer composite steel belt;
s4, spirally bending and rounding the double-layer composite steel belt by using spiral steel welded pipe processing equipment, continuously welding two welding seams at the inner and outer parts of the pipe, and continuously forming the steel pipe.
And when the steel belt is coiled into a circle, and the circle is contacted with the edge of the unreeled steel belt, the protruding part of the reinforcing rib on one side is overlapped with the staggered edge on the other side, a welding port is formed with the steel belt, and the welding ports on the inner and outer parts of the pair of pipes are welded and fixed.
Furthermore, in the step S3, other reinforcing ribs except the reinforcing ribs at the two sides are welded with the second steel belt layer into a whole by adopting penetration welding.
Further, in S3, the first steel belt layer comprises a plurality of split steel belts which are arranged in parallel, the split steel belts are respectively discharged from steel coils and placed on the reinforcing ribs, the seams of the adjacent split steel belts correspond to one reinforcing rib, a welding seam is formed, and the three are welded and fixed through the welding seam.
Further, in S4, after the double-layer composite steel belt is manufactured, the upper pressing roller and the lower pressing roller enter the delivery propelling device and are respectively pressed on the outer sides of the first steel belt layer and the second steel belt layer, pressure reinforcing wheels are respectively arranged at the welding edges of the upper pressing roller and the lower pressing roller corresponding to the first steel belt layer and the second steel belt layer, and the pressure reinforcing wheels and the pressing rollers are respectively pressed on the inner surface and the outer surface of the welding edges so as to increase the contact surface between the propelling device and the double-layer composite steel belt, increase propelling force and ensure that the section of the steel belt is not deformed under the pressure and the propelling force.
Further, concrete is filled between the first steel belt layer and the second steel belt layer.
The beneficial effects are that: compared with the prior art, the application has the advantages that:
1. the welding seams of the inner pipe wall and the outer pipe wall of the spiral welding steel pipe are not overlapped, so that stress concentration is avoided, and the strength of the steel pipe is increased.
2. In the manufacturing process of the spiral welded steel pipe, as the steel belt layers are arranged in a staggered manner, butt joint of staggered edges during coiling can be completed only by one reinforcing rib at the welding joint, so that the steel consumption is reduced.
3. In the propelling process of the spiral welded steel pipe, due to the design of staggered single-layer steel plates at the left side and the right side of the composite steel belt structure and the addition of the pressure reinforcing wheel in the corresponding propelling structure, the pressure of the pressure reinforcing wheel is applied to the single-layer staggered steel plates, so that the composite steel belt is not required to be deformed by pressure, the propelling force is increased, and the section of the steel belt is ensured not to be deformed under the pressure and the propelling force.
4. When a plurality of reinforcing ribs are added in the double-layer composite steel belt, the reinforcing ribs and the steel belt layers can be directly fixed by adopting a penetration welding technology, so that the whole steel belt can be adopted for both the steel belt layers without splitting.
5. The composite steel strip with the double-layer structure of the same width has the advantages that compared with the composite steel strip with the rectangular section of the original patented patent, the section moment of inertia is greatly reduced, the power of production equipment can be greatly reduced, meanwhile, the strength requirement on the equipment structure is reduced, and the equipment cost is reduced.
6. After filling concrete between two-layer steel band, make between first layer steel band and the second floor steel band, can pass power each other to bear internal pressure and external pressure jointly with the concrete cooperation atress, form steel and concrete composite structure, the concrete has supporting and restraint effect to the steel sheet all around, prevents that the steel sheet atress buckling, and the steel sheet all around has parcel and restraint effect to the concrete simultaneously, makes concrete compressive capacity improve.
Drawings
FIG. 1 is a diagram of a weld groove structure of prior application 202110902131.9;
FIG. 2 is a diagram showing the structure of the composite steel strip of the prior application 202110902131.9 after transitional extrusion deformation;
FIG. 3 is a block diagram of a large diameter spiral welded steel pipe of the composite structure wall of the present application;
FIG. 4 is a cross-sectional view of the extending direction of the double-layered composite steel strip of the present application;
FIG. 5 is a cross-sectional view of the inner reinforcing ribs of the double-layer composite steel strip of the present application;
FIG. 6 is a view showing a split steel strip structure of a double-layered composite steel strip according to the present application;
FIG. 7 is a flow chart of the present application for manufacturing by penetration welding;
FIG. 8 is a flow chart of the present application for manufacturing a split steel strip;
FIG. 9 is a schematic diagram of a pressure-intensifying wheel construction of the present application;
FIG. 10 is a cross-sectional view of a steel pipe according to the present application after cutting;
FIG. 11 is an enlarged view of the weld joint at A in FIG. 10 according to the present application.
Description of the embodiments
The application is described in further detail below with reference to the drawings and the detailed description.
The large-caliber spiral welded steel pipe with the composite structure wall shown in fig. 3 is formed by spirally winding and welding double-layer composite steel strips.
As shown in fig. 4, the double-layer composite steel belt comprises a first steel belt layer 1 and a second steel belt layer 2 which are equal in width, parallel and staggered, two reinforcing ribs 3 perpendicular to the first steel belt layer 1 and the second steel belt layer 2 are arranged between the first steel belt layer 1 and the second steel belt layer 2, the reinforcing ribs 3 are respectively arranged at the edge of the first steel belt layer 1 overlapped with the second steel belt layer 2 in the vertical direction and are arranged in a coextensive manner with the steel belt layers, the reinforcing ribs 3 at the end parts of the two sides of the first steel belt layer 1 and the second steel belt layer 2 are mutually welded to form the double-layer composite steel belt, the adjacent steel belt layers of the steel pipes are connected through staggered edges 4, and concrete is filled between the double-layer steel belts.
As shown in fig. 11, the outer side edge of the reinforcing rib 3 arranged at the vertical overlapping edge of the first steel belt layer 1 and the second steel belt layer 2 protrudes out of the steel belt layer, and when the double-layer composite steel belt is coiled and welded, the protruding part of one side reinforcing rib is overlapped with the staggered edge 4 of the steel belt at the other side reaching the steel belt joint position after being coiled for one circle, a welding opening 5 is formed with the steel belt layer, and the steel belt can be coiled and welded to form through the welding opening 5.
As shown in fig. 5, a reinforcing rib 3 is further disposed between the reinforcing ribs 3 on both sides of the steel belt layer, so as to support the inside of the first steel belt layer 1 and the second steel belt layer 2, and all the reinforcing ribs 3 are mutually parallel and are mutually arranged in a co-extending manner. Considering that the reinforcing ribs 3 added inside the steel band layer are inconvenient to fix with the first steel band layer 1, penetration welding and steel band layer welding are adopted as a whole in the embodiment.
As shown in fig. 6, if the penetration welding process is not adopted, in consideration of inconvenient welding between the inner reinforcing ribs 3 and the steel belt layer, the first steel belt layer 1 needs to be divided into a plurality of split steel belts 101, which are arranged in parallel and welded, and the joints of the adjacent split steel belts 101 correspond to one reinforcing rib 3. In order to avoid that this continuous weld has an adverse effect on the drainage, in the above-mentioned double-layer composite steel strip coil welding, the first steel strip layer 1 is located on the outer wall of the pipe, so that the weld is produced on the outer wall of the pipe.
Shear nails are arranged on the inner sides of the first steel belt layer 1 and the second steel belt layer 2, steel bars are arranged on the shear nails, and concrete is filled in the gaps. The reinforcing ribs 3 are formed steel, such as H-shaped steel, channel steel, angle steel bars, thin steel pipes, steel bars, corrugated steel and the like.
As shown in fig. 7, the method for manufacturing the large-diameter spiral welded steel pipe with the composite structure wall comprises the following steps:
s1, discharging a second steel belt from the steel coil, and horizontally placing to form a second steel belt layer 2.
S2, discharging reinforcing ribs 3 from a plurality of vertical steel coils, placing the reinforcing ribs perpendicular to the second steel belt layer 2, wherein two outermost reinforcing ribs 3 are arranged at the end part of the side edge of the second steel belt layer 2, the other reinforcing rib 3 is arranged at a distance from the end part of the other side of the second steel belt layer 2, one reinforcing rib is additionally arranged between the reinforcing ribs 3 at the two sides, the reinforcing ribs are arranged in a coextensive manner, and the bottoms of the reinforcing ribs 3 are welded with the second steel belt layer 2.
S3, releasing a first steel strip with the same width as the second steel strip from a steel coil, horizontally arranging the first steel strip 1 on the reinforcing ribs 3 in a staggered manner corresponding to the second steel strip, wherein the two reinforcing ribs 3 mentioned in S2 are respectively corresponding to a distance from one side end part of the first steel strip 1 and the other side end part of the first steel strip 1, and welding and fixing the two reinforcing ribs 3 except the two reinforcing ribs 3 to form a double-layer composite steel strip, and welding the other reinforcing ribs 3 and the second steel strip 2 into a whole by adopting penetration welding, wherein the outer side edge of the reinforcing rib 3 arranged at the vertical overlapping edge of the first steel strip 1 and the second steel strip 2 is provided with a convex steel strip; if the penetration welding process is not needed in this step, considering that the internal reinforcing ribs 3 and the steel belt layers are inconvenient to weld, the first steel belt layer 1 is divided into two split steel belts 101 which are arranged in parallel, the steel belts are respectively discharged from steel coils and placed on the reinforcing ribs 3, the seams of the adjacent split steel belts 101 correspond to one reinforcing rib 3 to form welding seams, and the welding seams are used for welding and fixing the three, and the flow is shown in fig. 8.
S4, after the double-layer composite steel belt is manufactured, the steel belt enters an upper press roller and a lower press roller of a delivery propelling device and is respectively pressed on the outer sides of the first steel belt layer 1 and the second steel belt layer 2, as shown in fig. 9, pressure reinforcing wheels 6 are respectively arranged at the positions, corresponding to the staggered edges 4, of the first steel belt layer 1 and the second steel belt layer 2, of the upper press roller and the lower press roller, the pressure reinforcing wheels 6 and the press roller are respectively pressed on the inner surface and the outer surface of the staggered edges 4, spiral bending and rolling are carried out through processing equipment, welding is continuously carried out on two welding seams inside and outside the pipe, and the steel pipe is continuously formed. When the steel strip is coiled into a circle, a circle of track is completed, and when the track is contacted with the edge of the steel strip which is not coiled, the convex part of one side of the reinforcing rib is overlapped with the welding edge of the other side, a welding port 5 is formed with the steel strip layer, and the welding ports 5 at the inner and outer positions of the pair of pipes are welded and fixed, as shown in fig. 10 and 11.
Claims (15)
1. A large-caliber spiral welded steel pipe with a composite structure wall is characterized in that: the double-layer composite steel strip is formed by spirally rolling and welding; the double-layer composite steel belt comprises a first steel belt layer (1) and a second steel belt layer (2) which are equal in width, parallel and staggered; at least two reinforcing ribs (3) perpendicular to the first steel belt layer (1) and the second steel belt layer (2) are arranged between the first steel belt layer and the second steel belt layer, and are arranged in a coextensive manner with the steel belt layers; reinforcing ribs (3) are respectively arranged at the edges of the first steel belt layer (1) and the second steel belt layer (2) which are overlapped in the vertical direction, and after spiral rolling, adjacent steel belt layers of the steel pipe are connected through staggered edges.
2. The composite structural wall heavy caliber spiral welded steel pipe of claim 1, wherein: the outer side edge of the reinforcing rib (3) arranged at the vertical superposition edge of the first steel belt layer (1) and the second steel belt layer (2) is convex with the steel belt layer, when the double-layer composite steel belt is coiled and welded, the convex part of one side reinforcing rib is lapped with the staggered edge (4) of the steel belt at the other side reaching the steel belt joint position after being coiled for one circle, and a welding hole (5) is formed with the steel belt layer.
3. The composite structural wall heavy caliber spiral welded steel pipe of claim 1, wherein: a plurality of reinforcing ribs (3) are arranged between the reinforcing ribs (3) on two sides of the steel belt layer at intervals at the same time, the first steel belt layer (1) and the second steel belt layer (2) are internally supported, and all the reinforcing ribs (3) are mutually parallel and are arranged in a co-extending mode.
4. A composite structural wall heavy caliber spiral welded steel pipe according to claim 3, characterized in that: the reinforcing ribs (3) additionally arranged in the steel belt layer are welded with the steel belt layer into a whole by penetration welding.
5. A composite structural wall heavy caliber spiral welded steel pipe according to claim 3, characterized in that: the first steel belt layer (1) is formed by arranging and welding a plurality of split steel belts (101) in parallel, the joints of the adjacent split steel belts (101) correspond to one reinforcing rib (3), and when the double-layer composite steel belt is welded, the first steel belt layer (1) is positioned on the outer wall of a pipeline.
6. The composite structural wall heavy caliber spiral welded steel pipe of claim 1, wherein: the cavity between the first steel belt layer (1) and the second steel belt layer (2) is filled with concrete.
7. The composite structural wall heavy caliber spiral welded steel pipe of claim 1, wherein: shear nails are arranged on the inner sides of the first steel belt layer (1) and the second steel belt layer (2).
8. The composite structural wall heavy caliber spiral welded steel pipe of claim 1, wherein: and steel bars are arranged between the first steel belt layer (1) and the second steel belt layer (2).
9. The composite structural wall heavy caliber spiral welded steel pipe of claim 1, wherein: the reinforcing rib (3) is formed steel, such as: h-shaped steel, channel steel, angle steel bar, thin steel pipe, steel bar or wave steel.
10. The method for manufacturing a large-diameter spiral welded steel pipe with a composite structure wall according to claim 1, comprising the steps of:
s1, paying out a second steel belt from a steel coil, and horizontally placing to form a second steel belt layer (2);
s2, discharging reinforcing ribs (3) from a plurality of vertical steel coils, placing the reinforcing ribs perpendicular to the second steel belt layer (2), wherein two outermost reinforcing ribs (3) are arranged at the side end part of the second steel belt layer (2), the other reinforcing ribs (3) are arranged at a distance from the end part of the other side of the second steel belt layer (2), and the bottoms of the reinforcing ribs (3) are welded with the second steel belt layer (2);
s3, releasing a first steel belt with the same width as the second steel belt from the steel coil, horizontally arranging the first steel belt on the reinforcing ribs (3) in a staggered manner corresponding to the second steel belt to form a first steel belt layer (1), respectively corresponding to a part of a distance from one side end part of the first steel belt layer (1) to the two reinforcing ribs (3) mentioned in S2, and welding and fixing the other side end part of the first steel belt layer (1) to form a double-layer composite steel belt;
s4, spirally bending and rounding the double-layer composite steel belt by using spiral steel welded pipe processing equipment, continuously welding two welding seams at the inner and outer parts of the pipe, and continuously forming the steel pipe.
11. The method for manufacturing a composite structural wall heavy caliber spiral welded steel pipe according to claim 10, wherein: and S3, the outer side edge of the reinforcing rib (3) arranged at the vertical superposition edge of the first steel belt layer (1) and the second steel belt layer (2) is convex with the steel belt layer, S4, when the steel belt is coiled, a circle of track is completed, and when the steel belt is contacted with the edge of the unreeled steel belt, the convex part of one side of the reinforcing rib is overlapped with the staggered edge of the other side, a welding port (5) is formed with the steel belt layer, and the welding ports (5) at the inner and outer positions of the pair of pipes are welded and fixed.
12. The method for manufacturing a composite structural wall heavy caliber spiral welded steel pipe according to claim 10, wherein: and in the S3, the rest reinforcing ribs (3) except the reinforcing ribs (3) at the two sides are welded with the second steel belt layer (2) into a whole by adopting penetration welding.
13. The method for manufacturing a composite structural wall heavy caliber spiral welded steel pipe according to claim 10, wherein: and S3, the first steel belt layer (1) comprises a plurality of split steel belts (101) which are arranged in parallel, the split steel belts are respectively discharged from steel coils and placed on the reinforcing ribs (3), the seams of the adjacent split steel belts (101) correspond to one reinforcing rib (3), welding seams are formed, and the welding seams are used for welding and fixing the split steel belts, the adjacent split steel belts and the reinforcing ribs (3).
14. The method for manufacturing a composite structural wall heavy caliber spiral welded steel pipe according to claim 10, wherein: and S4, after the double-layer composite steel belt is manufactured, the steel belt enters an upper press roller and a lower press roller of the delivery propelling device and is respectively pressed on the outer sides of the first steel belt layer (1) and the second steel belt layer (2), pressure reinforcing wheels (6) are respectively arranged at welding edges (4) of the upper press roller and the lower press roller, which correspond to the first steel belt layer (1) and the second steel belt layer (2), and the pressure reinforcing wheels (6) and the press rollers are respectively pressed on the inner surface and the outer surface of the welding edges (4).
15. The method for manufacturing a composite structural wall heavy caliber spiral welded steel pipe according to claim 10, wherein: and filling concrete between the first steel belt layer (1) and the second steel belt layer (2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211023603.4A CN115405767A (en) | 2022-08-25 | 2022-08-25 | Large-caliber spiral welded steel pipe with composite structure wall and manufacturing method thereof |
| CN2022110236034 | 2022-08-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117167561A true CN117167561A (en) | 2023-12-05 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211023603.4A Pending CN115405767A (en) | 2022-08-25 | 2022-08-25 | Large-caliber spiral welded steel pipe with composite structure wall and manufacturing method thereof |
| CN202310991874.7A Pending CN117167561A (en) | 2022-08-25 | 2023-08-08 | Large-caliber spiral welded steel pipe with composite structural wall and manufacturing method thereof |
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